Micronutrient assessment at the country level : an international study /
Sillanpää, Mikko.
Food and Agriculture Organization of the United Nations.Soil Resources, Management and Conservation Service.
Institute of Crop and Soil Science (Jokioinen, Finland)
Finland.Ulkoasiainministeriö.Kehitysyhteistyöosasto.
Rome : Food and Agriculture Organization of the United Nations,
1990.
Published in cooperation with the Finnish International Development Agency (FINNIDA)
Includes bibliographical references (p. 174-178)
Trace elements in agriculture.
Soils